scholarly journals Pipeline Monitoring Using Highly Sensitive Vibration Sensor Based on Fiber Ring Cavity Laser

Sensors ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 2078
Author(s):  
Nageswara Lalam ◽  
Ping Lu ◽  
Abhishek Venketeswaran ◽  
Michael P. Buric
Keyword(s):  
Ring Laser ◽  
Ring Cavity ◽  
Single Mode ◽  
Vibration Sensor ◽  
Vibration Monitoring ◽  
Fiber Sensor ◽  
Fiber Ring ◽  
Lasing Wavelength ◽  
Highly Sensitive ◽  
Cavity Laser

A vibration fiber sensor based on a fiber ring cavity laser and an interferometer based single-mode-multimode-single-mode (SMS) fiber structure is proposed and experimentally demonstrated. The SMS fiber sensor is positioned within the laser cavity, where the ring laser lasing wavelength can be swept to an optimized wavelength using a simple fiber loop design. To obtain a better signal-to-noise ratio, the ring laser lasing wavelength is tuned to the maximum gain region biasing point of the SMS transmission spectrum. A wide range of vibration frequencies from 10 Hz to 400 kHz are experimentally demonstrated. In addition, the proposed highly sensitive vibration sensor system was deployed in a field-test scenario for pipeline acoustic emission monitoring. An SMS fiber sensor is mounted on an 18” diameter pipeline, and vibrations were induced at different locations using a piezoelectric transducer. The proposed method was shown to be capable of real-time pipeline vibration monitoring.

A fiber micro-vibration sensor based on single-mode fiber ring laser

2009 ◽  
Vol 7 (1) ◽  
pp. 26-28 ◽  
Author(s):  
甄胜来 Shenglai Zhen ◽  
刘仁柱 Renzhu Liu ◽  
俞本立 Benli ◽  
张静 Jing Zhang ◽  
韩保刚 Baogang Han
Keyword(s):  
Ring Laser ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Vibration Sensor ◽  
Fiber Ring Laser ◽  
Fiber Ring ◽  
Micro Vibration

scholarly journals A Fiber Ring Laser Sensor with a Side Polished Evanescent Enhanced Fiber for Highly Sensitive Temperature Measurement

Micromachines ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 586
Author(s):  
Weihao Lin ◽  
Yibin Liu ◽  
Liyang Shao ◽  
Mang I. Vai
Keyword(s):  
Temperature Sensor ◽  
Ring Laser ◽  
High Sensitivity ◽  
Laser Cavity ◽  
Single Mode ◽  
Laser Sensor ◽  
Fiber Ring Laser ◽  
Fiber Ring ◽  
Highly Sensitive ◽  
Side Polished Fiber

We demonstrate a highly sensitive and practical fiber-based temperature sensor system. The sensor is constructed based on a fiber ring laser (FRL) as well as a side-polished fiber filled with isopropanol. The laser cavity of the sensing part fiber is polished by the wheel fiber polishing system with residual thickness (RT) is selected to detect the temperature in the FRL. Thanks to the high thermo-optic coefficient of isopropanol, the sensitivity of the proposed temperature sensor could be effectively improved by filling isopropanol in the cost-less side polished single mode fiber. Refractive index (RI) of isopropanol changes with the surrounding temperature variation allowing high-sensitivity temperature sensing. Experimental results demonstrate that the side polished fiber can efficiently excite high-order cladding modes which enhance the modular interference increase the interaction between the evanescent wave and the isopropanol. Besides, the results show that the sensitivity can be as high as 2 nm/°C in the temperature range of 25 °C–35°C.

An all-fiber self-mixing range finder with tunable fiber ring cavity laser source

2020 ◽  
pp. 1-1
Author(s):  
Yunkun Zhao ◽  
Chenchen Wang ◽  
Yuanyang Zhao ◽  
Desheng Zhu ◽  
Liang Lu
Keyword(s):  
Ring Cavity ◽  
Laser Source ◽  
Range Finder ◽  
Fiber Ring ◽  
Cavity Laser

A vibration sensor based on Sagnac interferometer and fiber ring laser for fault diagnosis of bearing

2021 ◽  
Vol 64 ◽  
pp. 102554
Author(s):  
D.J. Meng ◽  
C.Y. Miao ◽  
X.G. Li ◽  
J. Li ◽  
J. Shi ◽  
...  
Keyword(s):  
Fault Diagnosis ◽  
Ring Laser ◽  
Vibration Sensor ◽  
Sagnac Interferometer ◽  
Fiber Ring Laser ◽  
Fiber Ring

Fiber Ring Cavity Laser Based on Modal Interference for Curvature Sensing

2016 ◽  
Vol 28 (8) ◽  
pp. 923-926 ◽  
Author(s):  
Chunran Sun ◽  
Muguang Wang ◽  
Jingxuan Liu ◽  
Shen Ye ◽  
Linjun Liang ◽  
...  
Keyword(s):  
Ring Cavity ◽  
Fiber Ring ◽  
Curvature Sensing ◽  
Modal Interference ◽  
Cavity Laser

Liquid level sensor based on fiber ring laser with single-mode-offset coreless-single-mode fiber structure

2016 ◽  
Vol 84 ◽  
pp. 59-63 ◽  
Author(s):  
Zixiao Wang ◽  
Zhongwei Tan ◽  
Rui Xing ◽  
Linjun Liang ◽  
Yanhui Qi ◽  
...  
Keyword(s):  
Ring Laser ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Liquid Level ◽  
Fiber Structure ◽  
Fiber Ring Laser ◽  
Fiber Ring ◽  
Level Sensor ◽  
Liquid Level Sensor

Orthogonal Dual-Frequency SOA-Fiber Laser

2013 ◽  
Vol 596 ◽  
pp. 129-133
Author(s):  
Yoshitaka Takahashi ◽  
Yudai Fukaya ◽  
Sho Takahashi
Keyword(s):  
Semiconductor Optical Amplifier ◽  
Ring Laser ◽  
Ring Cavity ◽  
Optical Amplifier ◽  
Dual Frequency ◽  
Heterodyne Interferometry ◽  
Fiber Ring Laser ◽  
Fiber Ring ◽  
Frequency Laser ◽  
Heterodyne Signal

In order to develop a new orthogonal dual-frequency laser, we studied a fiber ring laser using a SOA (semiconductor optical amplifier) and aim to apply it to a novel light source for optical heterodyne interferometry. The frequency difference was generated by a linear or circular birefringent medium inserted into the ring cavity. To obtain heterodyne signal optical and electrical filters were introduced.

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